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  • Spectrum dead: 8 vertical bars in alternating colorsI have been soldering on this basterd for a long time now. All IC's now have sockets (except the LM1889). I swapped all 4116's by types that are 100%…

    ... that pin 13 on the ULA is supposed to carry +12V ... Adrian Dickens - ZX Spectrum Hardware book, well, a Dutch translation, but ... , but the +12V on the ULA is definitely wrong...

    georgedb georgedb September 2009 Hardware
  • I bought my first ZX Spectrum 48k, now what ?Hi guys ! I recently go to Brussel in Belgium and found a ZX Spectrum at a "flea market" (sorry, I don't the correct word for that, let's call it a …

    ... :grin:)...[/QUOTE]

    The ULA mod is a little strange ... prior [/I]to the later ULA version that required a transistor ... . Note the ULA code number in the photograph ... [URL="http://www.zxdesign.info/book/"]Chris Smith[/URL] could shed ...
    RST#08 RST#08 September 2009 Hardware
  • Ahh.. the tape loading era! by ate bit[url]http://www.pouet.net/prod.php?which=53846[/url] It is UNBELIEVABLE!!! Effects while loading, MUSIC while loading (and loading normal speed !!!…

    ... spoiled port addresses.
    The ULA uses 32768 port addresses, the ... Selection. I quote from the book "Microprocessor Interfacing Techniques" by Austin ...
    roko roko October 2009 Sinclair Miscellaneous
  • Micro Men - BBC4 Thursday 8th Octobereh... thats it... There was a new add for Micro Men on BBC 4 last night after 'The Cell' ( nice speccy goodness in there, including Jet Set Willy ) …

    ... update : scrapping the ULA[/quote]

    The ULA *is* the Speccy ... a foreword for the Speccy book. What more do you expect ...
    chev chev October 2009 Sinclair Miscellaneous
  • Micro Men - BBC4 Thursday 8th Octobereh... thats it... There was a new add for Micro Men on BBC 4 last night after 'The Cell' ( nice speccy goodness in there, including Jet Set Willy ) …

    [QUOTE=cheveron;390585]The ULA *is* the Speccy. Without that, ... a foreword for the Speccy book. What more do you expect ...
    Pyjamarama Pyjamarama October 2009 Sinclair Miscellaneous
  • "8 CHANNELS" -ZX Spectrum BEEPER demoHi there. :) We finally managed to finish the BEEPER demo with 8-channels songs. You can get it from here: [url]http://pouet.net/prod.php?which=5…

    ... a simple wire from the ULA to the speaker, it also ... you see in any electronics book about capacitors charging and discharging ...
    Winston Winston November 2009 Sinclair Miscellaneous
  • More colours in existing games?I have been trying to follow the various threads about the new ULA and more colours. I don't understand quiet a lot of it as back in the day all I di…

    ... various threads about the new ULA and more colours. I ... to buy this new ULA at some point and ... br />
    The original ULA has been replicated with 100 ... game and a book about the ULA to finish first.< ... an option for 'Enhanced ULA'. Does that make existing ...
    chev chev December 2009 Emulators
  • More colours in existing games?I have been trying to follow the various threads about the new ULA and more colours. I don't understand quiet a lot of it as back in the day all I di…

    [QUOTE=aowen;405624]he original ULA has been replicated with 100% ... isometric game and a book about the ULA to finish first.[/QUOTE ... demand without affecting the normal ULA timing. Thankfully memory is fast ... 'm ploughing on with the book at the moment. That's ...
    csmith csmith December 2009 Emulators
  • ULA Book Price - Feedback PLEASEThe book is coming together very nicely, and I am in the process of kicking off all the administration tasks like getting ISBN numbers and setting up…

    ... forward to your book for so long. The ULA is the biggest ... that is only fair. The book at the end of the ...
    BloodBaz BloodBaz February 2010 Sinclair Miscellaneous
  • ULA Book Price - Feedback PLEASEThe book is coming together very nicely, and I am in the process of kicking off all the administration tasks like getting ISBN numbers and setting up…

    ... not a buyer for your book (sorry, too specialist ... someone genuinely wants this book they will find the extra ... WoS natter and somehow dragging book into it eg
    ... timing was crucial to ULA development as can be read ... br /> Now that this book is done can we ...
    Jumping Stack Jumping Stack February 2010 Sinclair Miscellaneous
  • ULA Price Poll - You get to chooseIt is difficult to set the price of the book. If it is too low I will undersell my efforts, too high and I overcharge. So choose what you would be w…

    Just make sure there are not copyrights on the ULA or your book will likely violate them.
    JamesD JamesD February 2010 Sinclair Miscellaneous
  • ULA Price Poll - You get to chooseIt is difficult to set the price of the book. If it is too low I will undersell my efforts, too high and I overcharge. So choose what you would be w…

    ... not copyrights on the ULA or your book will likely violate them ... /> Do you mean the term "ULA" , or the contents of the ... ULA?

    The product name "ULA" [i]was ... the Sinclair design in the ULA was patented, and subsequently passed ...
    csmith csmith February 2010 Sinclair Miscellaneous
  • ULA Price Poll - You get to chooseIt is difficult to set the price of the book. If it is too low I will undersell my efforts, too high and I overcharge. So choose what you would be w…

    ... not copyrights on the ULA or your book will likely violate them ...
    Winston Winston February 2010 Sinclair Miscellaneous
  • ULA Price Poll - You get to chooseIt is difficult to set the price of the book. If it is too low I will undersell my efforts, too high and I overcharge. So choose what you would be w…

    ... can't do with a book: put on e-reader, carry ... Spectrum ULA's... :razz:

    Why not sell the book online ... an electronic version of the book by e-mail, which honest ... original, printed version of the book (perhaps with electronic version included ...
    RetroTechie RetroTechie February 2010 Sinclair Miscellaneous
  • ULA Price Poll - You get to chooseIt is difficult to set the price of the book. If it is too low I will undersell my efforts, too high and I overcharge. So choose what you would be w…

    ... who would value the book as a book - myself included, I like ... wouldn't be dissecting Spectrum ULA's... :razz:[/quote]
    I ... /> [quote]Why not sell the book online with different options:
    book is formatted to 6x9 inch ...
    csmith csmith February 2010 Sinclair Miscellaneous
  • ULA Price Poll - You get to chooseIt is difficult to set the price of the book. If it is too low I will undersell my efforts, too high and I overcharge. So choose what you would be w…

    ... only part of the book content. The book [i]explains[/i] everything ... detail about Ferranti and their ULA process. Everything you need to ... [i]understand[/i] the ULA and Sinclairs design.

    ULA: How to Design a Microcomputer ...
    csmith csmith February 2010 Sinclair Miscellaneous
  • Cant DecideI have had a lot of spectrums in my time from the 16k to the +3 and as we all know they all have flaws. I am thinking about buying another and wanted…

    ... Smith has reverse engineered the ULA it is now possible to ... placed my order for the book yet.

    Nice to ...
    BiNMaN BiNMaN July 2010 Hardware
  • ZX ULA Book releaseThe book is complete and with the printer. Once the proof copy is back and checked, and assuming no changes are required, I'll start shipping all you…

    ... [url]http://www.zxdesign.info/book/bookAnnounce.shtml[/url] :

    [quote]"The ZX Spectrum ULA: How to design a microcomputer ...
    gasman gasman August 2010 Sinclair Miscellaneous
  • ZX ULA Book releaseThe book is complete and with the printer. Once the proof copy is back and checked, and assuming no changes are required, I'll start shipping all you…

    ... the U.S. buying this book. :)

    If I remember ... correctly, the book will mention some of the ... Claudio regarding the NTSC Spectrum ULA as well. :)
    zxbruno zxbruno August 2010 Sinclair Miscellaneous
  • ZX ULA Book releaseThe book is complete and with the printer. Once the proof copy is back and checked, and assuming no changes are required, I'll start shipping all you…

    ... you all who bought the book.

    Note that I ... from the book (the easy parts like history of ula and ula snow ... 'll keep *working* on the book, to understand zx spectrum better ... you chris for this wonderful book.
    Arda Arda August 2010 Sinclair Miscellaneous
  • ZX ULA Book releaseThe book is complete and with the printer. Once the proof copy is back and checked, and assuming no changes are required, I'll start shipping all you…

    ... and little mistakes in the book. I'm not surprised and ... missed in a 68000 word book ;-) (even though it was proof ... />
    I could create a "ULA Errata" thread for people to ...
    csmith csmith September 2010 Sinclair Miscellaneous
  • ZX ULA Book releaseThe book is complete and with the printer. Once the proof copy is back and checked, and assuming no changes are required, I'll start shipping all you…

    ... and little mistakes in the book. I'm not surprised and ... missed in a 68000 word book ;-) (even though it was proof ... />
    I could create a "ULA Errata" thread for people to ...
    MrCheese MrCheese September 2010 Sinclair Miscellaneous
  • ula bookula book is here: [url]http://www.zxdesign.info/book/[/url] can i post sam coupe stuff here - she kind of is a speccy if you stuff the speccy rom i…

    ... memory isnt done by the ULA, but provided for by a ... />
    However, I digress. The book BTW is excellent, and everyone ...
    spodula spodula September 2010 Hardware
  • Pretty CrashesTo make a 48K spectrum crash spectacularly and beautifully enter the following into basic. Also works on a 128k in 48k mode though not quite as prett…

    Toni Baker's book was adapted from an earlier ... by accident to the Spectrum book or without the changes to ... the RAM will cause the ULA snow effect, and there's ...
    Matt_B Matt_B September 2010 Sinclair Basic
  • ZX ULA Book releaseThe book is complete and with the printer. Once the proof copy is back and checked, and assuming no changes are required, I'll start shipping all you…

    ... cover. Very enlightening, especially the ULA bugs and work arounds, that ... have got and read the book. The amount and depth of ...
    Patrik Rak Patrik Rak September 2010 Sinclair Miscellaneous
  • zx spectrum ULAis the ULA in the 16K the same as in the 48K could you take the 16K ULA and place it in a 48K I ask this because i have a speccy thats dogy with th…

    [QUOTE=Robin;482581]is the ULA in the 16K the same ... /> could you take the 16K ULA and place it in a ... ]

    Depends on the ULA version. There are few which ... /ZX-Spectrum-ULA-Design-Microcomputer/dp/0956507107"]this excellent book[/URL] or ...
    Patrik Rak Patrik Rak October 2010 Hardware
  • Do ULAs die?Thought I'd start this thread as people often think their ULA is dead, when it's actually the RAM or power circuits. Searching the forum in the futur…

    ... as people often think their ULA is dead, when it' ... ULA to die.[/I]

    As I was finishing the book ... research, I accidentally connected a ULA on a ... my 48k had a dead ULA, the power circuits had ... . I put a spare ULA in and it worked so ...
    guesser guesser October 2010 Hardware
  • Do ULAs die?Thought I'd start this thread as people often think their ULA is dead, when it's actually the RAM or power circuits. Searching the forum in the futur…

    ... that I received Chris?s book from Amazon yesterday. I?m ... same for the QL's ULA .... go on, it won't ...
    RST#08 RST#08 October 2010 Hardware
  • Do ULAs die?Thought I'd start this thread as people often think their ULA is dead, when it's actually the RAM or power circuits. Searching the forum in the futur…

    ... that I received Chris?s book from Amazon yesterday. I?m ... same for the QL's ULA .... go on, it won't ... me if I attempt another book... A second edition though... hmm ...
    csmith csmith October 2010 Hardware
  • emulatorsplease help can we see clearly which emulator emaulates which hardware is there any that has a pc function key for the mulitface nmi button and the +…

    ... aabstraction - i could write a book - it means that if i ... for mode 4? pity the ula+ chap didnt get hold of ...
    Roger Jowett Roger Jowett October 2010 Emulators
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